In The Wizard of Oz how did they get the Oz part?

Answer:
Author and Oz series originator Lyman Frank Baum [May 15, 1856-May 5, 1919] identified the alphabetical tags to filing cabinets as the inspiration for the name Oz. On one of the days that he was puzzling over a name, he just happened to look at the identifying tags to the drawers. What suddenly stood out was the tag O-Z.
First answer by Ginezumi. Last edit by Ginezumi. Contributor trust: 903 [recommend contributor recommended]. Question popularity: 2 [recommend question].